In the work "Smarter than the Devil", Napoleon Hill teaches us that the biggest obstacle to our success is our own "inner devil". This "devil" is represented by our fears, doubts and self-sabotage.

Self-analysis is the process of examining ourselves, from the inside out. It is an essential process for our self-knowledge and personal development.

Through self-analysis, we can identify our own "inner devils" and begin to overcome them.